let QRCode = {};
(function() {
  /**
     * 获取单个字符的utf8编码
     * unicode BMP平面约65535个字符
     * @param {num} code
     * return {array}
     */
  function unicodeFormat8(code) {
    // 1 byte
    var c0, c1, c2
    if (code < 128) {
      return [code]
      // 2 bytes
    } else if (code < 2048) {
      c0 = 192 + (code >> 6)
      c1 = 128 + (code & 63)
      return [c0, c1]
      // 3 bytes
    } else {
      c0 = 224 + (code >> 12)
      c1 = 128 + (code >> 6 & 63)
      c2 = 128 + (code & 63)
      return [c0, c1, c2]
    }
  }
  /**
     * 获取字符串的utf8编码字节串
     * @param {string} string
     * @return {array}
     */
  function getUTF8Bytes(string) {
    var utf8codes = []
    for (var i = 0; i < string.length; i++) {
      var code = string.charCodeAt(i)
      var utf8 = unicodeFormat8(code)
      for (var j = 0; j < utf8.length; j++) {
        utf8codes.push(utf8[j])
      }
    }
    return utf8codes
  }
  /**
     * 二维码算法实现
     * @param {string} data              要编码的信息字符串
     * @param {num} errorCorrectLevel 纠错等级
     */
  function QRCodeAlg(data, errorCorrectLevel) {
    this.typeNumber = -1 // 版本
    this.errorCorrectLevel = errorCorrectLevel
    this.modules = null // 二维矩阵，存放最终结果
    this.moduleCount = 0 // 矩阵大小
    this.dataCache = null // 数据缓存
    this.rsBlocks = null // 版本数据信息
    this.totalDataCount = -1 // 可使用的数据量
    this.data = data
    this.utf8bytes = getUTF8Bytes(data)
    this.make()
  }
  QRCodeAlg.prototype = {
    constructor: QRCodeAlg,
    /**
         * 获取二维码矩阵大小
         * @return {num} 矩阵大小
         */
    getModuleCount: function() {
      return this.moduleCount
    },
    /**
         * 编码
         */
    make: function() {
      this.getRightType()
      this.dataCache = this.createData()
      this.createQrcode()
    },
    /**
         * 设置二位矩阵功能图形
         * @param  {bool} test 表示是否在寻找最好掩膜阶段
         * @param  {num} maskPattern 掩膜的版本
         */
    makeImpl: function(maskPattern) {
      this.moduleCount = this.typeNumber * 4 + 17
      this.modules = new Array(this.moduleCount)
      for (var row = 0; row < this.moduleCount; row++) {
        this.modules[row] = new Array(this.moduleCount)
      }
      this.setupPositionProbePattern(0, 0)
      this.setupPositionProbePattern(this.moduleCount - 7, 0)
      this.setupPositionProbePattern(0, this.moduleCount - 7)
      this.setupPositionAdjustPattern()
      this.setupTimingPattern()
      this.setupTypeInfo(true, maskPattern)
      if (this.typeNumber >= 7) {
        this.setupTypeNumber(true)
      }
      this.mapData(this.dataCache, maskPattern)
    },
    /**
         * 设置二维码的位置探测图形
         * @param  {num} row 探测图形的中心横坐标
         * @param  {num} col 探测图形的中心纵坐标
         */
    setupPositionProbePattern: function(row, col) {
      for (var r = -1; r <= 7; r++) {
        if (row + r <= -1 || this.moduleCount <= row + r) continue
        for (var c = -1; c <= 7; c++) {
          if (col + c <= -1 || this.moduleCount <= col + c) continue
          if ((r >= 0 && r <= 6 && (c == 0 || c == 6)) || (c >= 0 && c <= 6 && (r == 0 || r == 6)) || (r >= 2 && r <= 4 && c >= 2 && c <= 4)) {
            this.modules[row + r][col + c] = true
          } else {
            this.modules[row + r][col + c] = false
          }
        }
      }
    },
    /**
         * 创建二维码
         * @return {[type]} [description]
         */
    createQrcode: function() {
      var minLostPoint = 0
      var pattern = 0
      var bestModules = null
      for (var i = 0; i < 8; i++) {
        this.makeImpl(i)
        var lostPoint = QRUtil.getLostPoint(this)
        if (i == 0 || minLostPoint > lostPoint) {
          minLostPoint = lostPoint
          pattern = i
          bestModules = this.modules
        }
      }
      this.modules = bestModules
      this.setupTypeInfo(false, pattern)
      if (this.typeNumber >= 7) {
        this.setupTypeNumber(false)
      }
    },
    /**
         * 设置定位图形
         * @return {[type]} [description]
         */
    setupTimingPattern: function() {
      for (var r = 8; r < this.moduleCount - 8; r++) {
        if (this.modules[r][6] != null) {
          continue
        }
        this.modules[r][6] = (r % 2 == 0)
        if (this.modules[6][r] != null) {
          continue
        }
        this.modules[6][r] = (r % 2 == 0)
      }
    },
    /**
         * 设置矫正图形
         * @return {[type]} [description]
         */
    setupPositionAdjustPattern: function() {
      var pos = QRUtil.getPatternPosition(this.typeNumber)
      for (var i = 0; i < pos.length; i++) {
        for (var j = 0; j < pos.length; j++) {
          var row = pos[i]
          var col = pos[j]
          if (this.modules[row][col] != null) {
            continue
          }
          for (var r = -2; r <= 2; r++) {
            for (var c = -2; c <= 2; c++) {
              if (r == -2 || r == 2 || c == -2 || c == 2 || (r == 0 && c == 0)) {
                this.modules[row + r][col + c] = true
              } else {
                this.modules[row + r][col + c] = false
              }
            }
          }
        }
      }
    },
    /**
         * 设置版本信息（7以上版本才有）
         * @param  {bool} test 是否处于判断最佳掩膜阶段
         * @return {[type]}      [description]
         */
    setupTypeNumber: function(test) {
      var bits = QRUtil.getBCHTypeNumber(this.typeNumber)
      for (var i = 0; i < 18; i++) {
        var mod = (!test && ((bits >> i) & 1) == 1)
        this.modules[Math.floor(i / 3)][i % 3 + this.moduleCount - 8 - 3] = mod
        this.modules[i % 3 + this.moduleCount - 8 - 3][Math.floor(i / 3)] = mod
      }
    },
    /**
         * 设置格式信息（纠错等级和掩膜版本）
         * @param  {bool} test
         * @param  {num} maskPattern 掩膜版本
         * @return {}
         */
    setupTypeInfo: function(test, maskPattern) {
      var data = (QRErrorCorrectLevel[this.errorCorrectLevel] << 3) | maskPattern
      var bits = QRUtil.getBCHTypeInfo(data)
      // vertical
      for (var i = 0; i < 15; i++) {
        var mod = (!test && ((bits >> i) & 1) == 1)
        if (i < 6) {
          this.modules[i][8] = mod
        } else if (i < 8) {
          this.modules[i + 1][8] = mod
        } else {
          this.modules[this.moduleCount - 15 + i][8] = mod
        }
        // horizontal
        var mod = (!test && ((bits >> i) & 1) == 1)
        if (i < 8) {
          this.modules[8][this.moduleCount - i - 1] = mod
        } else if (i < 9) {
          this.modules[8][15 - i - 1 + 1] = mod
        } else {
          this.modules[8][15 - i - 1] = mod
        }
      }
      // fixed module
      this.modules[this.moduleCount - 8][8] = (!test)
    },
    /**
         * 数据编码
         * @return {[type]} [description]
         */
    createData: function() {
      var buffer = new QRBitBuffer()
      var lengthBits = this.typeNumber > 9 ? 16 : 8
      buffer.put(4, 4) // 添加模式
      buffer.put(this.utf8bytes.length, lengthBits)
      for (var i = 0, l = this.utf8bytes.length; i < l; i++) {
        buffer.put(this.utf8bytes[i], 8)
      }
      if (buffer.length + 4 <= this.totalDataCount * 8) {
        buffer.put(0, 4)
      }
      // padding
      while (buffer.length % 8 != 0) {
        buffer.putBit(false)
      }
      // padding
      while (true) {
        if (buffer.length >= this.totalDataCount * 8) {
          break
        }
        buffer.put(QRCodeAlg.PAD0, 8)
        if (buffer.length >= this.totalDataCount * 8) {
          break
        }
        buffer.put(QRCodeAlg.PAD1, 8)
      }
      return this.createBytes(buffer)
    },
    /**
         * 纠错码编码
         * @param  {buffer} buffer 数据编码
         * @return {[type]}
         */
    createBytes: function(buffer) {
      var offset = 0
      var maxDcCount = 0
      var maxEcCount = 0
      var length = this.rsBlock.length / 3
      var rsBlocks = new Array()
      for (var i = 0; i < length; i++) {
        var count = this.rsBlock[i * 3 + 0]
        var totalCount = this.rsBlock[i * 3 + 1]
        var dataCount = this.rsBlock[i * 3 + 2]
        for (var j = 0; j < count; j++) {
          rsBlocks.push([dataCount, totalCount])
        }
      }
      var dcdata = new Array(rsBlocks.length)
      var ecdata = new Array(rsBlocks.length)
      for (var r = 0; r < rsBlocks.length; r++) {
        var dcCount = rsBlocks[r][0]
        var ecCount = rsBlocks[r][1] - dcCount
        maxDcCount = Math.max(maxDcCount, dcCount)
        maxEcCount = Math.max(maxEcCount, ecCount)
        dcdata[r] = new Array(dcCount)
        for (var i = 0; i < dcdata[r].length; i++) {
          dcdata[r][i] = 0xff & buffer.buffer[i + offset]
        }
        offset += dcCount
        var rsPoly = QRUtil.getErrorCorrectPolynomial(ecCount)
        var rawPoly = new QRPolynomial(dcdata[r], rsPoly.getLength() - 1)
        var modPoly = rawPoly.mod(rsPoly)
        ecdata[r] = new Array(rsPoly.getLength() - 1)
        for (var i = 0; i < ecdata[r].length; i++) {
          var modIndex = i + modPoly.getLength() - ecdata[r].length
          ecdata[r][i] = (modIndex >= 0) ? modPoly.get(modIndex) : 0
        }
      }
      var data = new Array(this.totalDataCount)
      var index = 0
      for (var i = 0; i < maxDcCount; i++) {
        for (var r = 0; r < rsBlocks.length; r++) {
          if (i < dcdata[r].length) {
            data[index++] = dcdata[r][i]
          }
        }
      }
      for (var i = 0; i < maxEcCount; i++) {
        for (var r = 0; r < rsBlocks.length; r++) {
          if (i < ecdata[r].length) {
            data[index++] = ecdata[r][i]
          }
        }
      }
      return data
    },
    /**
         * 布置模块，构建最终信息
         * @param  {} data
         * @param  {} maskPattern
         * @return {}
         */
    mapData: function(data, maskPattern) {
      var inc = -1
      var row = this.moduleCount - 1
      var bitIndex = 7
      var byteIndex = 0
      for (var col = this.moduleCount - 1; col > 0; col -= 2) {
        if (col == 6) col--
        while (true) {
          for (var c = 0; c < 2; c++) {
            if (this.modules[row][col - c] == null) {
              var dark = false
              if (byteIndex < data.length) {
                dark = (((data[byteIndex] >>> bitIndex) & 1) == 1)
              }
              var mask = QRUtil.getMask(maskPattern, row, col - c)
              if (mask) {
                dark = !dark
              }
              this.modules[row][col - c] = dark
              bitIndex--
              if (bitIndex == -1) {
                byteIndex++
                bitIndex = 7
              }
            }
          }
          row += inc
          if (row < 0 || this.moduleCount <= row) {
            row -= inc
            inc = -inc
            break
          }
        }
      }
    }
  }
  /**
     * 填充字段
     */
  QRCodeAlg.PAD0 = 0xEC
  QRCodeAlg.PAD1 = 0x11
  // ---------------------------------------------------------------------
  // 纠错等级对应的编码
  // ---------------------------------------------------------------------
  var QRErrorCorrectLevel = [1, 0, 3, 2]
  // ---------------------------------------------------------------------
  // 掩膜版本
  // ---------------------------------------------------------------------
  var QRMaskPattern = {
    PATTERN000: 0,
    PATTERN001: 1,
    PATTERN010: 2,
    PATTERN011: 3,
    PATTERN100: 4,
    PATTERN101: 5,
    PATTERN110: 6,
    PATTERN111: 7
  }
  // ---------------------------------------------------------------------
  // 工具类
  // ---------------------------------------------------------------------
  var QRUtil = {
    /*
        每个版本矫正图形的位置
         */
    PATTERN_POSITION_TABLE: [
      [],
      [6, 18],
      [6, 22],
      [6, 26],
      [6, 30],
      [6, 34],
      [6, 22, 38],
      [6, 24, 42],
      [6, 26, 46],
      [6, 28, 50],
      [6, 30, 54],
      [6, 32, 58],
      [6, 34, 62],
      [6, 26, 46, 66],
      [6, 26, 48, 70],
      [6, 26, 50, 74],
      [6, 30, 54, 78],
      [6, 30, 56, 82],
      [6, 30, 58, 86],
      [6, 34, 62, 90],
      [6, 28, 50, 72, 94],
      [6, 26, 50, 74, 98],
      [6, 30, 54, 78, 102],
      [6, 28, 54, 80, 106],
      [6, 32, 58, 84, 110],
      [6, 30, 58, 86, 114],
      [6, 34, 62, 90, 118],
      [6, 26, 50, 74, 98, 122],
      [6, 30, 54, 78, 102, 126],
      [6, 26, 52, 78, 104, 130],
      [6, 30, 56, 82, 108, 134],
      [6, 34, 60, 86, 112, 138],
      [6, 30, 58, 86, 114, 142],
      [6, 34, 62, 90, 118, 146],
      [6, 30, 54, 78, 102, 126, 150],
      [6, 24, 50, 76, 102, 128, 154],
      [6, 28, 54, 80, 106, 132, 158],
      [6, 32, 58, 84, 110, 136, 162],
      [6, 26, 54, 82, 110, 138, 166],
      [6, 30, 58, 86, 114, 142, 170]
    ],
    G15: (1 << 10) | (1 << 8) | (1 << 5) | (1 << 4) | (1 << 2) | (1 << 1) | (1 << 0),
    G18: (1 << 12) | (1 << 11) | (1 << 10) | (1 << 9) | (1 << 8) | (1 << 5) | (1 << 2) | (1 << 0),
    G15_MASK: (1 << 14) | (1 << 12) | (1 << 10) | (1 << 4) | (1 << 1),
    /*
        BCH编码格式信息
         */
    getBCHTypeInfo: function(data) {
      var d = data << 10
      while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15) >= 0) {
        d ^= (QRUtil.G15 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G15)))
      }
      return ((data << 10) | d) ^ QRUtil.G15_MASK
    },
    /*
        BCH编码版本信息
         */
    getBCHTypeNumber: function(data) {
      var d = data << 12
      while (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18) >= 0) {
        d ^= (QRUtil.G18 << (QRUtil.getBCHDigit(d) - QRUtil.getBCHDigit(QRUtil.G18)))
      }
      return (data << 12) | d
    },
    /*
        获取BCH位信息
         */
    getBCHDigit: function(data) {
      var digit = 0
      while (data != 0) {
        digit++
        data >>>= 1
      }
      return digit
    },
    /*
        获取版本对应的矫正图形位置
         */
    getPatternPosition: function(typeNumber) {
      return QRUtil.PATTERN_POSITION_TABLE[typeNumber - 1]
    },
    /*
        掩膜算法
         */
    getMask: function(maskPattern, i, j) {
      switch (maskPattern) {
        case QRMaskPattern.PATTERN000:
          return (i + j) % 2 == 0
        case QRMaskPattern.PATTERN001:
          return i % 2 == 0
        case QRMaskPattern.PATTERN010:
          return j % 3 == 0
        case QRMaskPattern.PATTERN011:
          return (i + j) % 3 == 0
        case QRMaskPattern.PATTERN100:
          return (Math.floor(i / 2) + Math.floor(j / 3)) % 2 == 0
        case QRMaskPattern.PATTERN101:
          return (i * j) % 2 + (i * j) % 3 == 0
        case QRMaskPattern.PATTERN110:
          return ((i * j) % 2 + (i * j) % 3) % 2 == 0
        case QRMaskPattern.PATTERN111:
          return ((i * j) % 3 + (i + j) % 2) % 2 == 0
        default:
          throw new Error('bad maskPattern:' + maskPattern)
      }
    },
    /*
        获取RS的纠错多项式
         */
    getErrorCorrectPolynomial: function(errorCorrectLength) {
      var a = new QRPolynomial([1], 0)
      for (var i = 0; i < errorCorrectLength; i++) {
        a = a.multiply(new QRPolynomial([1, QRMath.gexp(i)], 0))
      }
      return a
    },
    /*
        获取评价
         */
    getLostPoint: function(qrCode) {
      var moduleCount = qrCode.getModuleCount()
      var lostPoint = 0
      var darkCount = 0
      for (var row = 0; row < moduleCount; row++) {
        var sameCount = 0
        var head = qrCode.modules[row][0]
        for (var col = 0; col < moduleCount; col++) {
          var current = qrCode.modules[row][col]
          // level 3 评价
          if (col < moduleCount - 6) {
            if (current && !qrCode.modules[row][col + 1] && qrCode.modules[row][col + 2] && qrCode.modules[row][col + 3] && qrCode.modules[row][col + 4] && !qrCode.modules[row][col + 5] && qrCode.modules[row][col + 6]) {
              if (col < moduleCount - 10) {
                if (qrCode.modules[row][col + 7] && qrCode.modules[row][col + 8] && qrCode.modules[row][col + 9] && qrCode.modules[row][col + 10]) {
                  lostPoint += 40
                }
              } else if (col > 3) {
                if (qrCode.modules[row][col - 1] && qrCode.modules[row][col - 2] && qrCode.modules[row][col - 3] && qrCode.modules[row][col - 4]) {
                  lostPoint += 40
                }
              }
            }
          }
          // level 2 评价
          if ((row < moduleCount - 1) && (col < moduleCount - 1)) {
            var count = 0
            if (current) count++
            if (qrCode.modules[row + 1][col]) count++
            if (qrCode.modules[row][col + 1]) count++
            if (qrCode.modules[row + 1][col + 1]) count++
            if (count == 0 || count == 4) {
              lostPoint += 3
            }
          }
          // level 1 评价
          if (head ^ current) {
            sameCount++
          } else {
            head = current
            if (sameCount >= 5) {
              lostPoint += (3 + sameCount - 5)
            }
            sameCount = 1
          }
          // level 4 评价
          if (current) {
            darkCount++
          }
        }
      }
      for (var col = 0; col < moduleCount; col++) {
        var sameCount = 0
        var head = qrCode.modules[0][col]
        for (var row = 0; row < moduleCount; row++) {
          var current = qrCode.modules[row][col]
          // level 3 评价
          if (row < moduleCount - 6) {
            if (current && !qrCode.modules[row + 1][col] && qrCode.modules[row + 2][col] && qrCode.modules[row + 3][col] && qrCode.modules[row + 4][col] && !qrCode.modules[row + 5][col] && qrCode.modules[row + 6][col]) {
              if (row < moduleCount - 10) {
                if (qrCode.modules[row + 7][col] && qrCode.modules[row + 8][col] && qrCode.modules[row + 9][col] && qrCode.modules[row + 10][col]) {
                  lostPoint += 40
                }
              } else if (row > 3) {
                if (qrCode.modules[row - 1][col] && qrCode.modules[row - 2][col] && qrCode.modules[row - 3][col] && qrCode.modules[row - 4][col]) {
                  lostPoint += 40
                }
              }
            }
          }
          // level 1 评价
          if (head ^ current) {
            sameCount++
          } else {
            head = current
            if (sameCount >= 5) {
              lostPoint += (3 + sameCount - 5)
            }
            sameCount = 1
          }
        }
      }
      // LEVEL4
      var ratio = Math.abs(100 * darkCount / moduleCount / moduleCount - 50) / 5
      lostPoint += ratio * 10
      return lostPoint
    }

  }
  // ---------------------------------------------------------------------
  // QRMath使用的数学工具
  // ---------------------------------------------------------------------
  var QRMath = {
    /*
        将n转化为a^m
         */
    glog: function(n) {
      if (n < 1) {
        throw new Error('glog(' + n + ')')
      }
      return QRMath.LOG_TABLE[n]
    },
    /*
        将a^m转化为n
         */
    gexp: function(n) {
      while (n < 0) {
        n += 255
      }
      while (n >= 256) {
        n -= 255
      }
      return QRMath.EXP_TABLE[n]
    },
    EXP_TABLE: new Array(256),
    LOG_TABLE: new Array(256)

  }
  for (var i = 0; i < 8; i++) {
    QRMath.EXP_TABLE[i] = 1 << i
  }
  for (var i = 8; i < 256; i++) {
    QRMath.EXP_TABLE[i] = QRMath.EXP_TABLE[i - 4] ^ QRMath.EXP_TABLE[i - 5] ^ QRMath.EXP_TABLE[i - 6] ^ QRMath.EXP_TABLE[i - 8]
  }
  for (var i = 0; i < 255; i++) {
    QRMath.LOG_TABLE[QRMath.EXP_TABLE[i]] = i
  }
  // ---------------------------------------------------------------------
  // QRPolynomial 多项式
  // ---------------------------------------------------------------------
  /**
     * 多项式类
     * @param {Array} num   系数
     * @param {num} shift a^shift
     */
  function QRPolynomial(num, shift) {
    if (num.length == undefined) {
      throw new Error(num.length + '/' + shift)
    }
    var offset = 0
    while (offset < num.length && num[offset] == 0) {
      offset++
    }
    this.num = new Array(num.length - offset + shift)
    for (var i = 0; i < num.length - offset; i++) {
      this.num[i] = num[i + offset]
    }
  }
  QRPolynomial.prototype = {
    get: function(index) {
      return this.num[index]
    },
    getLength: function() {
      return this.num.length
    },
    /**
         * 多项式乘法
         * @param  {QRPolynomial} e 被乘多项式
         * @return {[type]}   [description]
         */
    multiply: function(e) {
      var num = new Array(this.getLength() + e.getLength() - 1)
      for (var i = 0; i < this.getLength(); i++) {
        for (var j = 0; j < e.getLength(); j++) {
          num[i + j] ^= QRMath.gexp(QRMath.glog(this.get(i)) + QRMath.glog(e.get(j)))
        }
      }
      return new QRPolynomial(num, 0)
    },
    /**
         * 多项式模运算
         * @param  {QRPolynomial} e 模多项式
         * @return {}
         */
    mod: function(e) {
      var tl = this.getLength()
      var el = e.getLength()
      if (tl - el < 0) {
        return this
      }
      var num = new Array(tl)
      for (var i = 0; i < tl; i++) {
        num[i] = this.get(i)
      }
      while (num.length >= el) {
        var ratio = QRMath.glog(num[0]) - QRMath.glog(e.get(0))

        for (var i = 0; i < e.getLength(); i++) {
          num[i] ^= QRMath.gexp(QRMath.glog(e.get(i)) + ratio)
        }
        while (num[0] == 0) {
          num.shift()
        }
      }
      return new QRPolynomial(num, 0)
    }
  }

  // ---------------------------------------------------------------------
  // RS_BLOCK_TABLE
  // ---------------------------------------------------------------------
  /*
    二维码各个版本信息[块数, 每块中的数据块数, 每块中的信息块数]
     */
  var RS_BLOCK_TABLE = [
    // L
    // M
    // Q
    // H
    // 1
    [1, 26, 19],
    [1, 26, 16],
    [1, 26, 13],
    [1, 26, 9],

    // 2
    [1, 44, 34],
    [1, 44, 28],
    [1, 44, 22],
    [1, 44, 16],

    // 3
    [1, 70, 55],
    [1, 70, 44],
    [2, 35, 17],
    [2, 35, 13],

    // 4
    [1, 100, 80],
    [2, 50, 32],
    [2, 50, 24],
    [4, 25, 9],

    // 5
    [1, 134, 108],
    [2, 67, 43],
    [2, 33, 15, 2, 34, 16],
    [2, 33, 11, 2, 34, 12],

    // 6
    [2, 86, 68],
    [4, 43, 27],
    [4, 43, 19],
    [4, 43, 15],

    // 7
    [2, 98, 78],
    [4, 49, 31],
    [2, 32, 14, 4, 33, 15],
    [4, 39, 13, 1, 40, 14],

    // 8
    [2, 121, 97],
    [2, 60, 38, 2, 61, 39],
    [4, 40, 18, 2, 41, 19],
    [4, 40, 14, 2, 41, 15],

    // 9
    [2, 146, 116],
    [3, 58, 36, 2, 59, 37],
    [4, 36, 16, 4, 37, 17],
    [4, 36, 12, 4, 37, 13],

    // 10
    [2, 86, 68, 2, 87, 69],
    [4, 69, 43, 1, 70, 44],
    [6, 43, 19, 2, 44, 20],
    [6, 43, 15, 2, 44, 16],

    // 11
    [4, 101, 81],
    [1, 80, 50, 4, 81, 51],
    [4, 50, 22, 4, 51, 23],
    [3, 36, 12, 8, 37, 13],

    // 12
    [2, 116, 92, 2, 117, 93],
    [6, 58, 36, 2, 59, 37],
    [4, 46, 20, 6, 47, 21],
    [7, 42, 14, 4, 43, 15],

    // 13
    [4, 133, 107],
    [8, 59, 37, 1, 60, 38],
    [8, 44, 20, 4, 45, 21],
    [12, 33, 11, 4, 34, 12],

    // 14
    [3, 145, 115, 1, 146, 116],
    [4, 64, 40, 5, 65, 41],
    [11, 36, 16, 5, 37, 17],
    [11, 36, 12, 5, 37, 13],

    // 15
    [5, 109, 87, 1, 110, 88],
    [5, 65, 41, 5, 66, 42],
    [5, 54, 24, 7, 55, 25],
    [11, 36, 12],

    // 16
    [5, 122, 98, 1, 123, 99],
    [7, 73, 45, 3, 74, 46],
    [15, 43, 19, 2, 44, 20],
    [3, 45, 15, 13, 46, 16],

    // 17
    [1, 135, 107, 5, 136, 108],
    [10, 74, 46, 1, 75, 47],
    [1, 50, 22, 15, 51, 23],
    [2, 42, 14, 17, 43, 15],

    // 18
    [5, 150, 120, 1, 151, 121],
    [9, 69, 43, 4, 70, 44],
    [17, 50, 22, 1, 51, 23],
    [2, 42, 14, 19, 43, 15],

    // 19
    [3, 141, 113, 4, 142, 114],
    [3, 70, 44, 11, 71, 45],
    [17, 47, 21, 4, 48, 22],
    [9, 39, 13, 16, 40, 14],

    // 20
    [3, 135, 107, 5, 136, 108],
    [3, 67, 41, 13, 68, 42],
    [15, 54, 24, 5, 55, 25],
    [15, 43, 15, 10, 44, 16],

    // 21
    [4, 144, 116, 4, 145, 117],
    [17, 68, 42],
    [17, 50, 22, 6, 51, 23],
    [19, 46, 16, 6, 47, 17],

    // 22
    [2, 139, 111, 7, 140, 112],
    [17, 74, 46],
    [7, 54, 24, 16, 55, 25],
    [34, 37, 13],

    // 23
    [4, 151, 121, 5, 152, 122],
    [4, 75, 47, 14, 76, 48],
    [11, 54, 24, 14, 55, 25],
    [16, 45, 15, 14, 46, 16],

    // 24
    [6, 147, 117, 4, 148, 118],
    [6, 73, 45, 14, 74, 46],
    [11, 54, 24, 16, 55, 25],
    [30, 46, 16, 2, 47, 17],

    // 25
    [8, 132, 106, 4, 133, 107],
    [8, 75, 47, 13, 76, 48],
    [7, 54, 24, 22, 55, 25],
    [22, 45, 15, 13, 46, 16],

    // 26
    [10, 142, 114, 2, 143, 115],
    [19, 74, 46, 4, 75, 47],
    [28, 50, 22, 6, 51, 23],
    [33, 46, 16, 4, 47, 17],

    // 27
    [8, 152, 122, 4, 153, 123],
    [22, 73, 45, 3, 74, 46],
    [8, 53, 23, 26, 54, 24],
    [12, 45, 15, 28, 46, 16],

    // 28
    [3, 147, 117, 10, 148, 118],
    [3, 73, 45, 23, 74, 46],
    [4, 54, 24, 31, 55, 25],
    [11, 45, 15, 31, 46, 16],

    // 29
    [7, 146, 116, 7, 147, 117],
    [21, 73, 45, 7, 74, 46],
    [1, 53, 23, 37, 54, 24],
    [19, 45, 15, 26, 46, 16],

    // 30
    [5, 145, 115, 10, 146, 116],
    [19, 75, 47, 10, 76, 48],
    [15, 54, 24, 25, 55, 25],
    [23, 45, 15, 25, 46, 16],

    // 31
    [13, 145, 115, 3, 146, 116],
    [2, 74, 46, 29, 75, 47],
    [42, 54, 24, 1, 55, 25],
    [23, 45, 15, 28, 46, 16],

    // 32
    [17, 145, 115],
    [10, 74, 46, 23, 75, 47],
    [10, 54, 24, 35, 55, 25],
    [19, 45, 15, 35, 46, 16],

    // 33
    [17, 145, 115, 1, 146, 116],
    [14, 74, 46, 21, 75, 47],
    [29, 54, 24, 19, 55, 25],
    [11, 45, 15, 46, 46, 16],

    // 34
    [13, 145, 115, 6, 146, 116],
    [14, 74, 46, 23, 75, 47],
    [44, 54, 24, 7, 55, 25],
    [59, 46, 16, 1, 47, 17],

    // 35
    [12, 151, 121, 7, 152, 122],
    [12, 75, 47, 26, 76, 48],
    [39, 54, 24, 14, 55, 25],
    [22, 45, 15, 41, 46, 16],

    // 36
    [6, 151, 121, 14, 152, 122],
    [6, 75, 47, 34, 76, 48],
    [46, 54, 24, 10, 55, 25],
    [2, 45, 15, 64, 46, 16],

    // 37
    [17, 152, 122, 4, 153, 123],
    [29, 74, 46, 14, 75, 47],
    [49, 54, 24, 10, 55, 25],
    [24, 45, 15, 46, 46, 16],

    // 38
    [4, 152, 122, 18, 153, 123],
    [13, 74, 46, 32, 75, 47],
    [48, 54, 24, 14, 55, 25],
    [42, 45, 15, 32, 46, 16],

    // 39
    [20, 147, 117, 4, 148, 118],
    [40, 75, 47, 7, 76, 48],
    [43, 54, 24, 22, 55, 25],
    [10, 45, 15, 67, 46, 16],

    // 40
    [19, 148, 118, 6, 149, 119],
    [18, 75, 47, 31, 76, 48],
    [34, 54, 24, 34, 55, 25],
    [20, 45, 15, 61, 46, 16]
  ]

  /**
     * 根据数据获取对应版本
     * @return {[type]} [description]
     */
  QRCodeAlg.prototype.getRightType = function() {
    for (var typeNumber = 1; typeNumber < 41; typeNumber++) {
      var rsBlock = RS_BLOCK_TABLE[(typeNumber - 1) * 4 + this.errorCorrectLevel]
      if (rsBlock == undefined) {
        throw new Error('bad rs block @ typeNumber:' + typeNumber + '/errorCorrectLevel:' + this.errorCorrectLevel)
      }
      var length = rsBlock.length / 3
      var totalDataCount = 0
      for (var i = 0; i < length; i++) {
        var count = rsBlock[i * 3 + 0]
        var dataCount = rsBlock[i * 3 + 2]
        totalDataCount += dataCount * count
      }
      var lengthBytes = typeNumber > 9 ? 2 : 1
      if (this.utf8bytes.length + lengthBytes < totalDataCount || typeNumber == 40) {
        this.typeNumber = typeNumber
        this.rsBlock = rsBlock
        this.totalDataCount = totalDataCount
        break
      }
    }
  }

  // ---------------------------------------------------------------------
  // QRBitBuffer
  // ---------------------------------------------------------------------
  function QRBitBuffer() {
    this.buffer = new Array()
    this.length = 0
  }
  QRBitBuffer.prototype = {
    get: function(index) {
      var bufIndex = Math.floor(index / 8)
      return ((this.buffer[bufIndex] >>> (7 - index % 8)) & 1)
    },
    put: function(num, length) {
      for (var i = 0; i < length; i++) {
        this.putBit(((num >>> (length - i - 1)) & 1))
      }
    },
    putBit: function(bit) {
      var bufIndex = Math.floor(this.length / 8)
      if (this.buffer.length <= bufIndex) {
        this.buffer.push(0)
      }
      if (bit) {
        this.buffer[bufIndex] |= (0x80 >>> (this.length % 8))
      }
      this.length++
    }
  }

  // xzedit
  const qrcodeAlgObjCache = []
  /**
     * 二维码构造函数，主要用于绘制
     * @param  {参数列表} opt 传递参数
     * @return {}
     */
  QRCode = function(opt) {
    // 设置默认参数
    this.options = {
      text: '',
      size: 256,
      correctLevel: 3,
      background: '#ffffff',
      foreground: '#000000',
      pdground: '#000000',
      image: '',
      imageSize: 30,
      canvasId: opt.canvasId,
      context: opt.context,
      usingComponents: opt.usingComponents,
      showLoading: opt.showLoading,
      loadingText: opt.loadingText
    }
    if (typeof opt === 'string') { // 只编码ASCII字符串
      opt = {
        text: opt
      }
    }
    if (opt) {
      for (var i in opt) {
        this.options[i] = opt[i]
      }
    }
    // 使用QRCodeAlg创建二维码结构
    var qrCodeAlg = null
    for (var i = 0, l = qrcodeAlgObjCache.length; i < l; i++) {
      if (qrcodeAlgObjCache[i].text == this.options.text && qrcodeAlgObjCache[i].text.correctLevel == this.options.correctLevel) {
        qrCodeAlg = qrcodeAlgObjCache[i].obj
        break
      }
    }
    if (i == l) {
      qrCodeAlg = new QRCodeAlg(this.options.text, this.options.correctLevel)
      qrcodeAlgObjCache.push({
        text: this.options.text,
        correctLevel: this.options.correctLevel,
        obj: qrCodeAlg
      })
    }
    /**
         * 计算矩阵点的前景色
         * @param {Obj} config
         * @param {Number} config.row 点x坐标
         * @param {Number} config.col 点y坐标
         * @param {Number} config.count 矩阵大小
         * @param {Number} config.options 组件的options
         * @return {String}
         */
    const getForeGround = function(config) {
      var options = config.options
      if (options.pdground && (
        (config.row > 1 && config.row < 5 && config.col > 1 && config.col < 5) ||
                (config.row > (config.count - 6) && config.row < (config.count - 2) && config.col > 1 && config.col < 5) ||
                (config.row > 1 && config.row < 5 && config.col > (config.count - 6) && config.col < (config.count - 2))
      )) {
        return options.pdground
      }
      return options.foreground
    }
    // 创建canvas
    const createCanvas = function(options) {
      if (options.showLoading) {
        uni.showLoading({
          title: options.loadingText,
          mask: true
        })
      }
      var ctx = uni.createCanvasContext(options.canvasId, options.context)
      var count = qrCodeAlg.getModuleCount()
      var ratioSize = options.size
      var ratioImgSize = options.imageSize
      // 计算每个点的长宽
      var tileW = (ratioSize / count).toPrecision(4)
      var tileH = (ratioSize / count).toPrecision(4)
      // 绘制
      for (var row = 0; row < count; row++) {
        for (var col = 0; col < count; col++) {
          var w = (Math.ceil((col + 1) * tileW) - Math.floor(col * tileW))
          var h = (Math.ceil((row + 1) * tileW) - Math.floor(row * tileW))
          var foreground = getForeGround({
            row: row,
            col: col,
            count: count,
            options: options
          })
          ctx.setFillStyle(qrCodeAlg.modules[row][col] ? foreground : options.background)
          ctx.fillRect(Math.round(col * tileW), Math.round(row * tileH), w, h)
        }
      }
      if (options.image) {
        var x = Number(((ratioSize - ratioImgSize) / 2).toFixed(2))
        var y = Number(((ratioSize - ratioImgSize) / 2).toFixed(2))
        drawRoundedRect(ctx, x, y, ratioImgSize, ratioImgSize, 2, 6, true, true)
        ctx.drawImage(options.image, x, y, ratioImgSize, ratioImgSize)
        // 画圆角矩形
        function drawRoundedRect(ctxi, x, y, width, height, r, lineWidth, fill, stroke) {
          ctxi.setLineWidth(lineWidth)
          ctxi.setFillStyle(options.background)
          ctxi.setStrokeStyle(options.background)
          ctxi.beginPath() // draw top and top right corner
          ctxi.moveTo(x + r, y)
          ctxi.arcTo(x + width, y, x + width, y + r, r) // draw right side and bottom right corner
          ctxi.arcTo(x + width, y + height, x + width - r, y + height, r) // draw bottom and bottom left corner
          ctxi.arcTo(x, y + height, x, y + height - r, r) // draw left and top left corner
          ctxi.arcTo(x, y, x + r, y, r)
          ctxi.closePath()
          if (fill) {
            ctxi.fill()
          }
          if (stroke) {
            ctxi.stroke()
          }
        }
      }
      setTimeout(() => {
        ctx.draw(true, () => {
          // 保存到临时区域
          // setTimeout(() => {
          uni.canvasToTempFilePath({
            width: options.width,
            height: options.height,
            destWidth: options.width,
            destHeight: options.height,
            canvasId: options.canvasId,
            quality: Number(1),
            success: function(res) {
              if (options.cbResult) {
                options.cbResult(res.tempFilePath)
              }
            },
            fail: function(res) {
              if (options.cbResult) {
                options.cbResult(res)
              }
            },
            complete: function() {
              if (options.showLoading) {
                uni.hideLoading()
              }
            }
          }, options.context)
          // }, options.text.length + 100);
        })
      }, options.usingComponents ? 0 : 150)
    }
    createCanvas(this.options)
    // 空判定
    const empty = function(v) {
      const tp = typeof v
      let rt = false
      if (tp == 'number' && String(v) == '') {
        rt = true
      } else if (tp == 'undefined') {
        rt = true
      } else if (tp == 'object') {
        if (JSON.stringify(v) == '{}' || JSON.stringify(v) == '[]' || v == null) rt = true
      } else if (tp == 'string') {
        if (v == '' || v == 'undefined' || v == 'null' || v == '{}' || v == '[]') rt = true
      } else if (tp == 'function') {
        rt = false
      }
      return rt
    }
  }
  QRCode.prototype.clear = function(fn) {
    var ctx = uni.createCanvasContext(this.options.canvasId, this.options.context)
    ctx.clearRect(0, 0, this.options.size, this.options.size)
    ctx.draw(false, () => {
      if (fn) {
        fn()
      }
    })
  }
})()

export default QRCode
